package atm;

import java.util.Scanner;

/**
 * 方法版本的ATM
 */
public class ATM03 {
    public static Scanner sc = new Scanner(System.in);
    public static String [][] users = {
            {"aaaaaa","111111","1000"},
            {"bbbbbb","222222","2000"},
            {"cccccc","333333","3000"},
            {"dddddd","444444","4000"},
            {"eeeeee","555555","5000"}
    };
    public static int index;

    /**
     * 主流程方法
     */
    public static void process(){

        System.out.println("欢迎使用XXX银行");
        while (true){
            login();
            menu();
        }
    }
    /**
     * 登录
     */
    public static void login(){
        for(int i = 0;i < 3;i++){
            // 登录判断
            System.out.println("请输入账号：");
            String account = sc.next();
            System.out.println("请输入密码：");
            String pwd = sc.next();
            boolean isLogin = false;
            for(int j = 0;j < users.length;j++){
                if(users[j][0].equals(account) && users[j][1].equals(pwd)){
                    System.out.println("登录成功");
                    index = j;
                    return;
                }
            }

                System.out.println("登录失败，还剩"+(2 - i)+"次");
                if(i == 2){
                    System.out.println("卡已被吞");
                    System.exit(0);
                }
        }
    }

    /**
     * 菜单
     */
    public static void menu(){
        while (true){
            System.out.println("请选择：1-存款 2-取款 3-查询 4-转账 5-修改密码 6-切换账号 7-退出");
            int input = sc.nextInt();
            if (input == 1){
                save();
            }
            if (input == 2){
                get();
            }
            if (input == 3){
                search();
            }
            if (input == 4){
                transfer();
            }
            if (input == 5){
                changePwd();
            }
            if (input == 6){
                break;
            }
            if (input == 7){
                System.out.println("退出系统");
                System.exit(0);
            }else if (input > 7){
                System.out.println("输入有误,请重新输入");
            }
        }
    }

    /**
     * 存款
     */
    public static void save(){
        System.out.println("请输入存的金额：");
        double blance = sc.nextDouble();
        users[index][2] = Double.parseDouble(users[index][2]) + blance + "";
        System.out.println("存款成功");
    }

    /**
     * 取款
     */
    public static void get(){
        System.out.println("请输入取款的金额：");
        double blance = sc.nextDouble();
        if(blance > Double.parseDouble(users[index][2])){
            System.out.println("余额不足");
        }else{
            users[index][2] = Double.parseDouble(users[index][2]) - blance + "";
            System.out.println("取款成功");
        }
    }

    /**
     * 查询余额
     */
    public static void search(){
        System.out.println("您的余额为："+users[index][2]);
    }

    /**
     * 转账
     */
    public static void transfer() {
            System.out.println("请输入对方账号：");
            String otherAccount = sc.next();
            // 不能转账给自己
            if (otherAccount.equals(users[index][0])) {
                System.out.println("不能转给自己");
                return;
            }
            // 判断对方账号是否存在
            boolean isExist = false;
            int otherIndex = 0;
            for (int i = 0; i < users.length; i++) {
                if (users[i][0].equals(otherAccount)) {
                    isExist = true;
                    otherIndex = i;
                    break;
                }
            }
            if (!isExist) {
                System.out.println("输入的对方账号错误");
                return;
            }
            System.out.println("请输入转账金额：");
            double blance = sc.nextDouble();
            // 判断余额是否足够
            if (blance > Double.parseDouble(users[index][2])) {
                System.out.println("余额不足");
                return;
            }
            // 从当前账号上扣去转账的金额
            users[index][2] = Double.parseDouble(users[index][2]) - blance + "";
            // 将转账的金额加在对方账号上
            users[otherIndex][2] = Double.parseDouble(users[otherIndex][2]) + blance + "";

            System.out.println("转账成功");
    }
    /**
     * 修改密码
     */
    public static void changePwd(){
        System.out.println("请输入旧密码：");
        String pwd = sc.next();
        boolean isPrime = false;
        if (users[index][1].equals(pwd)){
            isPrime = true;
        }else {
            System.out.println("密码输入错误");
            return;
        }
        if (isPrime){
           System.out.println("请输入新密码：");
           String newPwd1 = sc.next();
           System.out.println("请再次输入新密码：");
           String newPwd2 = sc.next();
           if (newPwd1.equals(newPwd2)){
               System.out.println("密码修改成功");
               users[index][1] = newPwd2;
           }else {
               System.out.println("新密码输入不同，修改失败");
               return;
           }
        }

    }
    public static void main(String[] args) {
        process();
    }
}

